Ursula K Schuch
- Professor, Plant Sciences
- Specialist, Plant Sciences
- Professor, Applied BioSciences - GIDP
- Member of the Graduate Faculty
Contact
- (520) 621-1060
- Forbes, Rm. 303
- Tucson, AZ 85721
- uschuch@arizona.edu
Awards
- Heart of Extension
- UA Cooperative Extension, Summer 2019
- Award of Arboricultural Research
- International Society of Arboriculture Western Chapter, Spring 2019
- President's Award
- Arizona Nursery Association, Fall 2018
- Short Publication Gold Award
- Association of Natural Resource Extension Professionals, Summer 2015
Interests
Teaching
Plant propagation and production management
Research
Landscape management, nursery production, plant stress physiology, salinity and drought tolerance of plants, irrigation requirements of trees, specialty crop production.
Courses
2023-24 Courses
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Arboriculture
PLS 303 (Spring 2024)
2022-23 Courses
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Arboriculture
PLS 303 (Spring 2023)
2021-22 Courses
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Arboriculture
PLS 303 (Spring 2022) -
Directed Research
PLS 592 (Fall 2021)
2019-20 Courses
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Intro to Research
PLP 695C (Fall 2019) -
Research
PLS 900 (Fall 2019)
2018-19 Courses
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Directed Research
PLS 492 (Fall 2018)
2017-18 Courses
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Directed Research
PLS 492 (Spring 2018) -
Directed Research
PLS 492 (Fall 2017) -
Plant Propagat, Product, Mgmt
PLS 330 (Fall 2017)
2016-17 Courses
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Research
PLS 900 (Spring 2017) -
Thesis
PLS 910 (Spring 2017) -
Research
PLS 900 (Fall 2016) -
Thesis
PLS 910 (Fall 2016)
2015-16 Courses
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Research
PLS 900 (Spring 2016)
Scholarly Contributions
Books
- McKenney, C., Schuch, U., & Chau, A. (2019). Introductory Plant Science: Investigating the Green World, 2nd Ed.. Dubuque, Iowa: Kendall Hunt.
- Nair, S., Nair, S., Gouge, D. H., Gouge, D. H., Rust, M. K., Rust, M. K., Li, S., Li, S., Schuch, U. K., Schuch, U. K., Fournier, A. J., Fournier, A. J., Kopec, D. M., Kopec, D. M., Umeda, K., Umeda, K., Baker, P. B., Baker, P. B., Brown, L. M., , Brown, L. M., et al. (2015). Handbook on pests of community environments in the desert southwest United States.. Maricopa AZ: University of Arizona Cooperative Extension/Arizona Pest Management Center.
- Schuch, U., McKenney, C., & Chau, A. (2014). Introductory Plant Science: Investigating the Green World. Dubuque, Iowa: Kendall Hunt.
Chapters
- Schuch, U. (2019). Dynamics of Plant Communities and Populations. In Introductory Plant Science: Investigating the Green World, 2nd Ed.. Dubuque, Iowa: Kendall Hunt.
- Schuch, U. (2019). Ecology. In Introductory Plant Science: Investigating the Green World, 2nd Ed.. Dubuque, Iowa: Kendall Hunt.
- Schuch, U. (2019). Ecosystems and Biomes. In Introductory Plant Science: Investigating the Green World, 2nd Ed.. Dubuque, Iowa: Kendall Hunt.
- Schuch, U. (2019). Plant Responses to Hormonal and Environmental Stimuli. In Introductory Plant Science: Investigating the Green World, 2nd Ed.. Dubuque, Iowa: Kendall Hunt.
- Schuch, U. (2019). Plants as Food, Commercial Products, and Pharmaceuticals. In Introductory Plant Science: Investigating the Green World, 2nd Ed.. Dubuque, Iowa: Kendall Hunt.
- Schuch, U. (2019). Soils, Plant Nutrition, and Transport in Plants. In Introductory Plant Science: Investigating the Green World, 2nd Ed.. Dubuque, Iowa: Kendall Hunt.
- Schuch, U. K. (2019). Photosynthesis. In Introductory Plant Science: Investigating the Green World, 2nd Ed.. Dubuque, Iowa: Kendall Hunt.
- Schuch, U. K. (2019). Respiration. In Introductory Plant Science: Investigating the Green World, 2nd. Ed.. Dubuque, Iowa: Kendall Hunt.
- Schuch, U. (2017). Pruning. In AZ Master Gardener Manual(pp 147-158). University of Arizona CALS Cooperative Extension.
- Schuch, U. (2016). Plants, Soils, and Water. In Smartscape Manual. University of Arizona CALS Cooperative Extension.
- Schuch, U. (2014). Dynamics of Plant Communities and Populations. In Introductory Plant Science: Investigating the Green World(pp 499-522). Dubuque, Iowa: Kendall Hunt.
- Schuch, U. (2014). Ecosystems and Biomes. In Introductory Plant Science: Investigating the Green World(pp 481-497). Dubuque, Iowa: Kendall Hunt.
- Schuch, U. (2014). Evolution. In Introductory Plant Science: Investigating the Green World(pp 265-285). Dubuque, Iowa: Kendall Hunt.
- Schuch, U. (2014). Nursery Site Selection and Development. In Container Nursery Production and Business Management(pp 17-28). Richmond, CA: Univ. of Calif. Agric. and Nat. Resour.More infoEditor(s): Newman, J
- Schuch, U. (2014). Plant Responses to Hormonal and Environmental Stimuli. In Introductory Plant Science: Investigating the Green World(pp 211-237). Dubuque, Iowa: Kendall Hunt.
- Schuch, U. (2014). Plants as Food, Commercial Products, and Pharmaceuticals. In Introductory Plant Science: Investigating the Green World(pp 523-551). Dubuque, Iowa: Kendall Hunt.
- Schuch, U. (2014). Soils, Plant Nutrition, and Transport in Plants. In Introductory Plant Science: Investigating the Green World(pp 239-262). Dubuque, Iowa: Kendall Hunt.
- Schuch, U. K. (2014). Photosynthesis and Respiration. In Introductory Plant Science: Investigating the Green World(pp 181-209). Dubuque, Iowa: Kendall Hunt.
- Schuch, U., Lieth, H., & Newman, J. (2014). Controlling Plant Growth. In Container Nursery Production and Business Management(pp 131-148). Richmond, CA: Univ. of Calif. Agric. and Nat. Resour.More infoEditor(s): Newman, J
- Schuch, U., Lieth, H., & Newman, J. (2014). Plant Growing Structures. In Container Nursery Production and Business Management(pp 29-42). Richmond, CA: Univ. of Calif. Agric. and Nat. Resour.More infoEditor(s): Newman, J
- Teegerstrom, T. -., Behe, B. K., Hodges, A. W., Newman, J. P., Kenkel, P., & Schuch, U. K. (2014). Business Management Basics, Chapter 18. In Container Nursery Production and Business Management(pp 269-291). University of California: Univ. of Calif. Agric. and Nat. Resour. Publication.
Journals/Publications
- Mpanga, I., Allen, J., & Schuch, U. K. (2021). Agroforestry as a sustainable ancient agriculture practice: potential for small-scale farmers and ranchers in dry regions. University of Arizona Cooperative Extension Bulletin.
- Mpanga, I., Schuch, U. K., & Schalau, J. W. (2021). Adaptation of Resilient Regenerative Agricultural Practices by Small-scale Growers Towards Sustainable Food Production in North-Central Arizona. Current Research in Environmental Sustainability.
- Schuch, U. K. (2021). Drought and Extreme Heat: Plant Responses and Landscape Maintenance Practices. University of Arizona Cooperative Extension Publication, 8.
- Schuch, U. K. (2021). The Benefits of Plants for Human Health in Healthcare Settings. University of Arizona Cooperative Extension Publication, 4.
- Schuch, U. K., & McCormick, G. B. (2021). Landscape Management Practices to Optimize Passive Rainwater Harvesting and Plant Health. University of Arizona Cooperative Extension Publication, 22.
- Mpanga, I., Neumann, G., Schuch, U. K., & Schalau, J. W. (2020). Sustainable Agriculture Practices as a Driver for Increased Harvested Cropland among Large-Scale Growers in Arizona: A Paradox for Small-Scale Growers. Advanced Sustainable Systems, 8.
- Nair, S., Li, S., Gouge, D. H., & Schuch, U. K. (2020). Keeping rodents away from sensitive environments through landscape management and IPM. University of Arizona Cooperative Extension Publication.
- Schuch, U. K. (2019). How to Hire a Tree Expert. Univ. of Arizona Coop. Extension Publication.More infoRevision of publication az1003, 2001.
- Ilyas, M., Avelar, S., Brown, J. K., & Schuch, U. K. (2018). First Report of an Emaravirus Associated with Witches’ Broom Disease and Eriophyid Mite Infestations of the Blue Palo Verde Tree in Arizona. Plant Disease, 102(9), 1863.
- Schuch, U. K. (2018). Specialty Crop Production Practices for Beginning Farmers in Arizona and the Southwest. Univ. of Arizona Coop. Extension Publication, 14.
- Schuch, U. K. (2018). Tree Irrigation Requirements in the Semiarid Southwestern United States. HortTechnology, 4(28), 427-430.
- Schuch, U. K., & Martin, E. C. (2017). A Study of Irrigation Requirements of Southwestern Landscape Trees. AZ Cooperative Extension Publication, 12.
- McKenney, C., Mahato, T. R., & Schuch, U. K. (2016). Salinity tolerance of ornamental grasses adapted to semi-arid environments. Acta Horticulturae, 95-99.
- Schuch, U. K. (2016). Trouble Shooting Problems of Bedding Plants in the Southwest. AZ Cooperative Extension Publication 1723, 5.
- Schuch, U. K., Call, R. E., & Daily, C. (2016). Drip Irrigation: The Basics. AZ Cooperative Extension Publication, 4.
- Schuch, U. K., Mahato, T. R., Subramani, J., & Martin, E. C. (2016). Response of desert-adapted landscape trees to deficit irrigation. Acta Horticulturae, 193-199.
- Schuch, U. K. (2015). Arizona Climate Zones and their Application to Growing Plants. UA Cooperative Extension Publication az1673.
- Warren, P. L., Quist, T. M., Schuch, U. K., Erickson, C., Celaya, B., & Richardson, J. (2015). Pine Engraver Beetles in the Low Elevation Sonoran Desert in Tucson. UA Cooperative Extension Publication az1689.
- Wright, G. C., & Schuch, U. K. (2015). Pomegranate Variety Trial in Arizona. HortScience, 50(9), S309 (Abstr.).
- Hanson, K., Mahato, T., & Schuch, U. K. (2014). Soil solarization in high tunnels in the semi-arid Southwest. HortScience, 49(9), 1165-1170.More infoUKS corresponding author
- Lessa, M. A., Schuch, U. K., Paiva, P. D., Paglis, C. M., Barbosa, J. P., Paiva, R., & Nogueira, D. A. (2013). Determination of leaf area and leaf number of Calandiva® associated with the accumulation of degree-day. Acta Horticulturae, 970, 329-338.More infoAbstract: Calandiva® is an ornamental species that is gaining prominence in the market of potted flowers due to the attractiveness of its inflorescences. Since it has been cultivated recently, some aspects of its development are still unknown. The objective of this study was to verify a mathematical procedure that allows to describe the formation and development of Calandiva® leaves associated with the growing degree-days accumulation (GDD). Two experiments were conducted using cuttings of Kalanchoe blossfeldiana 'Bisset' (Calandiva® Pink) and K. blossfeldiana 'Latin Lover Rio' (Calandiva® Orange), planted and grown in plastic pots containing substrate and submitted to fertigation. The experimental design was complete randomized block with four replicates. Each useful plot consisted of three plants, totaling twelve plants per assessment. Every fourteen days, during 105 days, the leaf area was determined with the aid of a leaf area meter. Seven destructive assessments were performed in each experiment. Two models were developed describing the relationship between leaf growth and GDD accumulation in Calandiva®. Growth data obtained of the 'Bisset' cultivar were used to develop these models and the validation was performed using data of the 'Latin Lover Rio' cultivar. The models have been validated and are acceptable for use to correlate of leaf area and number of leaves with growing degree-day in Calandiva® plants.
- Schuch, U. K., Wright, G. C., & Mahato, T. (2013). Pomegranate Variety Trial in Southern Arizona.. HortScience, 48(9), 396.
- McKenney, C., Bates, A., Decker, K., & Schuch, U. (2012). Raider Gold Plains Zinnia (Zinnia grandiflora Nutt.). HortScience, 47, 1801-1802.
- Schuch, U., Kelly, J., & Tipton, J. (2012). Planting Guidelines: Container Trees and Shrubs. UA Cooperative Extension Publication az1022.
- , A., Mathers, H., Long, D., Behe, B., Hodges, A., Schuch, U., Barton, S., Dennis, J., Maynard, B., Hall, C., Ingram, D., Posadas, B., & Beaver, J. (2011). Demographic Characteristics of the Nursery Industry Labor Force: OH, MI, DE, TN, FL, AZ, IN, KY, and RI. HortScience.
- Mathers, H. M., Acuña, A. A., Long, D. R., Behe, B. K., Hodges, A. W., Haydu, J. J., Schuch, U. K., Barton, S. S., Dennis, J. H., Maynard, B. K., Hall, C. R., McNeil, R., & Archer, T. (2010). Nursery worker turnover and language proficiency. HortScience, 45(1), 71-77.More infoAbstract: The U.S. nursery and landscape industry generates 1.9 million jobs and had an annual payroll of greater than $3 billion in 2002, yet little is known about nursery and landscape workers. This lack of information is even more pressing considering that labor generally accounts for greater than 40% of production costs and 31% of gross sales. Labor shortages, immigration reform, and legal status of employees are widely reported as the industry's most critical issues. We hypothesized that relevant data regarding the nursery industry workforce may raise an appreciation of the industry's diversity, increase political power and public awareness, and help stakeholders evaluate policy decisions and plan corrective strategies in a more informed manner. A total of 4466 selfadministered questionnaires were sent in 2006, attempting to reach 30 nurseries in each of nine states with 1561 returned (35% response rate). Hispanics constituted 70% of the average nursery workforce, including general laborers (76%), crew leaders (61%), and sales/managers (others) (21%). Across firms, labor retention was less than 51% after 5 years and only 22% of employees understood English, raising questions regarding availability and access to training. Sixty percent of nursery employees had not received work-related training, although 81% of men and 72% of women were interested, and an association between training and employee retention existed. The highest rated training topic of interest was English/Spanish (respective of Spanish/English primary language respondents). There was a positive correlation between developing fluency and worker turnover, making the laborer attrition rate even more unfavorable for employers who not only lost employees with acquired experience, but also with acquired English skills.
- Schuch, U. K., & Pemberton, H. B. (2010). Growth and water use of garden roses in two climates in the Southwestern United States. Acta Horticulturae, 870, 39-46.More infoAbstract: Roses are considered high water use plants although little is known about their quantitative water use in different climates. The objective of this study was to determine growth and water use of two cultivars of landscape roses in two locations in the Southwestern United States. Rosa L. WEKbepmey [Strike It Rich™ (SIR)] and RADtko [Double Knock Out® (DK)] were grown in 15.5 L containers in a substrate consisting of 60% compost and 40% soil to simulate a well amended garden soil. From July to November 2008 plants were grown in Tucson, Arizona (32°1649 N 110°5645 W) in a retractable roof greenhouse and in Overton, Texas (32°1739 N 945831 W) outdoors. DK was the larger of the two cultivars and produced 132 g shoot dry weight averaged over the two locations versus 92 g shoot dry weight for SIR after 16 weeks. Average shoot dry weight of roses in Arizona was 130 g and in Texas 92 g. The greater growth rate of plants in Tucson, Arizona, a semi-arid subtropical climate, is likely due to warmer temperatures in fall which supported continuous shoot mass increase until mid November, while the growth rate in Overton, Texas, a humid subtropical climate, was slower throughout the study. Reference evapotranspiration (ETo) was 30 to 120% greater at most sampling dates at the Arizona compared to the Texas location. Water use per plant was approximately two to three times greater in Arizona than in Texas and water use per leaf area followed this pattern. Water use of plants was significantly affected by climate, specifically temperature, but was not a direct function of local reference evapotranspiration.
- Schuch, U. K., Lewis, M. D., & Mahato, T. (2008). Performance of containerized roses in a retractable roof greenhouse or outdoors. Acta Horticulturae, 797, 267-272.More infoAbstract: Flowering rose plants in containers can be produced by transplanting bare root roses in late winter into containers and forcing them to flower in a greenhouse or outdoors until they are ready for shipping. Two experiments were conducted to determine how plant development and performance are affected when containerized roses are forced in a retractable roof greenhouse (RRGH) or outdoors in full sun. The first experiment compared performance of Rosa 'Mr. Lincoln' and 'Oregold' plants that were dug from the field in January or February and were placed for 0,4 or 8 weeks in cold storage before being potted and forced in a RRGH or outdoors in full sun. 'Oregold' plants forced in the RRGH in February after 4 weeks of cold storage flowered 6 days earlier than plans grown outdoors, but none of the other treatments resulted in significant changes in leaf emergence or flowering between the two environments. 'Mr. Lincoln' plants in the RRGH had more leaf area and greater stem dry weight than outdoors, while these variables were not affected for 'Oregold' plants in either environment. Water use differed by cultivar and was related to leaf area. 'Mr. Lincoln' plants had higher water use per plant, but less on a per leaf area basis than 'Oregold'. In the second experiment Rosa cultivars 'Oregold', 'Angel Face' and 'Chrysler Imperial' differed in plant size, leaf emergence, time to anthesis, and flower number and size. Plants forced in the RRGH were taller, had a greater number of flowers with greater diameter, and earlier leaf emergence than plants forced in full sun. Water use of roses forced in the RRGH was on average 13% less than in full sun.
- Becker, J. O., Schuch, U. K., & Karlik, J. F. (2007). Roses and emotive appeal: "if Zeus Chose Us a King of the Flowers". Acta Horticulturae, 751, 357-366.More infoAbstract: The aesthetic appeal of roses is consiDerable, but the production and sale of both rose plants and flowers is also influenced by overt and subtle messages conveyed by these flowers. In many cultures and since ancient time, roses have not only been popular flowers but powerful symbols of love, beauty, friendship, sexuality, and secrecy. Indeed, roses occupy an extraordinary place in literature, notably in poetry, and the associations of roses with particular emotions may provide a raison d'etre when consiDering the prominence of this plant in horticulture today. We identified specific emotions or emotional contexts for roses found in poetry and literature, and illustrate the place of roses in specific emotional contexts through selected works of writers including Sappho, Shakespeare, Spenser, Goethe, Nietzsche, Keats, Byron, and Burns. Through recognition of the history and emotional connections of these flowers, growers, buyers, recipients, and connoisseurs of roses may be better able to unDerstand and articulate the appeal of this most popular flower.
- Karlik, J. F., Haas, C. H., Becker, J. O., & Schuch, U. K. (2007). Delivery of gases via drip irrigation tubing: An exploratory study. Acta Horticulturae, 751, 69-76.More infoAbstract: Agrochemicals are typically applied in the solid or the liquid phase. Soil fumigants, such as methyl bromide (MeBr), can suppress invertebrate pests and pathogens found deep in the soil profile because of the chemical's movement in the gas phase through the soil air space. Replacement compounds for MeBr, or other agro- chemicals, may be applied in the gas phase. Experiments were conducted to explore whether or not two types of standard commercial drip irrigation tubing could be used to deliver gases when placed either above ground or at 20-22 cm depth. Air was introduced into one end and the flow rate was measured at varying distances from the source, and air flow from individual emitters was also measured. To see whether a gas introduced into buried tubing could be found in soil, propane mixed with air was introduced into both types of buried drip tubing over several time intervals. Samples were collected from soil gas sampling tubes placed 15, 30, and 45 cm to the side of the buried tubing and at selected distances from the inlet, and propane concentrations were quantified by gas chromatography. Propane concentrations decreased unevenly with distance from the inlet and lateral distance from the buried tubing. To approximate conditions in small plots, propane concentrations were measured in gas sampling tubes at three lateral distances from short (9.1 m) lengths of buried tubing. Propane concentrations in sampling tubes adjacent to these short tubing lengths were more uniform than those found for greater tubing lengths.
- Pemberton, H. B., & Schuch, U. K. (2007). Relationship between visually determined starch content and flowering of containerized field-grown garden roses. Acta Horticulturae, 751, 105-110.More infoAbstract: Rose (Rosa sp.) cultivars Chrysler Imperial, Christian Dior, Garden Party, and Oregold were harvested bare-root on 18 November and 2 December 2002 from a commercial nursery in Arizona. Grade 1 plants were stored for either 0, 2, or 4 weeks at 2°C and then were potted and forced to flowering in Tucson, Arizona and Tyler, Texas. At the time of digging and at the end of each storage period, representative plants were visually evaluated for starch content using stem cross sections stained with lugol solution. Starch ratings were similar across weeks of cold storage for the 18 November digging date, but declined with weeks of cold storage for some cultivars dug on 2 December. The number of flowering shoots was affected by cultivar, digging date and cold storage. Starch ratings of rose canes at the time of potting do not appear to be related to the number of flowering shoots or the time from potting to anthesis when bare-root plants are containerized and forced into flower.
- Schuch, U. K., Pemberton, H. B., & Kelly, J. J. (2007). Postharvest moisture loss from bare-root roses affects performance of containerized plants. HortScience, 42(3), 622-625.More infoAbstract: Five cultivars of bare-root rose plants were exposed to increasing periods of drying and after rehydration were grown in containers until flowering in a plastic-covered greenhouse. At the start of the experiment, moisture content of well-hydrated roses was between 51% and 56%. Five or 7 h of drying resulted in moisture contents below 43% for four of the cultivars and caused up to 80% mortality, increased time to iower, and decreased the number of flowering shoots. 'First Prize' was most tolerant of drying conditions and all plants survived, whereas 'Mister Lincoln' plants were most susceptible and had poor regrowth performance. Whole-plant moisture of 'Mister Lincoln' was similar to that in the stem or shank, which means that aboveground components instead of the entire plant can be used for moisture determination.
- Hahne, K. S., & Schuch, U. K. (2006). Nitrogen form and concentration affect nitrogen leaching and seedling growth of Prosopis velutina. HortScience, 41(1), 239-243.More infoAbstract: Velvet mesquite [Prosopis velutina Woot., Syn.: P. juliflora (Swartz) DC. var. velutina (Woot.) Sarg.] has become more popular in arid landscapes of the southwestern U.S., but little information on N requirements during the seedling stage is available. In addition to optimize growth of seedlings, minimizing N in runoff during production is an important consideration. Experiments were conducted to determine how biomass production and N leaching were affected first by different ratios of ammonium and nitrate N in sand culture and second by different N concentrations when seedlings were grown in two substrates. Mesquite seedlings produced the greatest biomass after 120 days when fertigated with a solution of 33 NO3-:67 NH4+. Loss of N through leachate was 40% greater when NH4+ comprised two thirds or more compared to one third or none in the fertigation solution. Nitrogen in leachate was highest after 16 weeks of treatment, coinciding with the reduced growth rate of seedlings. The second experiment utilized either sand or commercial growing media and a fertigation solution of 33 NO 3-:67 NH4+. Fertigation with 200 mg·L-1 N after 60 days in either substrate produced greatest biomass, while rates of 25, 50, or 100 mg·L-1 N produced about half of that biomass. With few exceptions, less N in either form was found in leachate when seedlings were grown in media and were fertigated with the two higher N rates compared to seedlings grown in sand at the two higher N rates. Plant morphology, biomass accumulation, photosynthate allocation, and the fate of N in the growing substrate and in leachate were strongly affected by the choice of growing substrate.
- Nelkin, J. B., & Schuch, U. K. (2004). Retractable roof greenhouse production of basil (ocimum basilicum) and lemon grass (cymbopogon citrates) in a semi-arid climate. Acta Horticulturae, 659, 113-120.More infoAbstract: Production of high quality herbs for fresh culinary markets was evaluated in a retractable roof greenhouse (RRGH) under semi-arid climate conditions. Two basil cultivars, 'Genovese' and 'Purple Ruffles' and lemon grass were grown in a RRGH under 35% and 50% shade, and in the field. Basil was grown using two production systems in the RRGH, hydroponic rockwool culture and peat-based media in containers. Lemon grass was grown in containers only. Environmental and physiological parameters were monitored throughout production. Lemon grass showed greatest biomass accumulation under 35% shade, producing 0.7 times more than in the 50% shade and 7 times more than in the field. Overall, 'Genovese' produced 91% more than 'Purple Ruffles'. Biomass accumulation of basil was affected more by media than by shade. During full production with weekly harvests, 'Genovese' and 'Purple Ruffles' in hydroponic rockwool culture produced 45% and 44%, respectively, more biomass than plants in containers and 106% and 160%, respectively, more than plants in the field. The quality of basil and lemon grass was superior in all RRGH treatments compared to the field. These results indicate culinary herb production in a RRGH can optimize biomass and quality of basil and lemon grass in a semi-arid climate.
- Schuch, U. K. (2004). Container production of ornamental crops in retractable roof greenhouses in semi-arid climate of the southwestern United States. Acta Horticulturae, 659, 105-111.More infoAbstract: Retractable roof greenhouses (RRGH) offer nursery growers in the semi-arid climates of the Southwestern United States protection from high temperatures and radiation in summer and from cold temperatures in winter with the option of growing in a full sun environment when environmental conditions are favorable. Environmental conditions such as PAR, air, leaf, and media temperatures, and responses of herbaceous and woody ornamental plants growing in containers in RRGH or other environments were monitored during different seasons in Arizona. Conditions inside RRGH were compared to plastic tunnels, stationary shade houses, and full sun environments. In winter, RRGH provided frost protection similar to plastic tunnels and maintained minimum air and media temperatures several degrees above freezing when air and media temperatures outside reached -2°C and 0°C, respectively. Water use of high and low water use ornamental plants was studied under different environments and varied by environment, species, container size and day.
- Haver, D. L., Schuch, U. K., & Lovatt, C. J. (2002). Exposure of Petunia seedlings to ethylene decreased apical dominance by reducing the ratio of auxin to cytokinin. Journal of Plant Growth Regulation, 21(4), 459-468.More infoAbstract: Seedlings of Petunia x hybrida 'Orchid' treated with the ethylene-releasing compound ethephon at 0.9, 1.7, and 3.5 mM evolved ethylene at a higher rate as the concentration of ethephon increased. Regardless of the concentration of ethephon applied, ethylene evolution peaked 6 to 8 h following application. Evidence that ethephon application decreased apical dominance included an increase in the number of new nodes on the main stem and a sustained increase in the length of new and existing lateral shoots compared to the control (no ethephon). Plants treated with 3.5 mM ethephon developed mild chlorosis, whereas a concentration of 1.7 mM ethephon decreased apical dominance without phytotoxic effects. The auxin/cytokinin ratio decreased in the apical shoot section as early as 1 h after ethephon treatment. In contrast, a decrease in the ratio in the subapicai shoot section was not detected until 24 h after ethephon application. Reduction in auxin/cytokinin ratio was a result of a decrease in indole-3-acetic acid (IAA) and an increase of zeatin riboside (ZR), but not isopentenyladenosine (iPA). These results suggest that exposing 'Orchid' petunia seedlings to ethylene via ethephon lowers the auxin/cytokinin ratio, thereby promoting the outgrowth of lateral shoots.
- Schuch, U. K., Davison, E., & Kelly, J. (2002). Vegetative Propagation of Southwestern Plants: Ambrosia deltoidea, Buddleja marrubifolia, Vauquelinia californica, and Vauquelinia corymboss. International Plant Propagators' Society. Combined Proceedings of Annual Meetings, 52, 637-643.More infoAbstract: The vegetative propagation of ambrosia deltoidea, buddleja marrubifolia, vauquelinia californica, and vauquelinia corymbosa species was discussed. Highest root percentage was achieved with a treatment of Hormodin 1, and the lowest rooting occurred on plants treated with Dip 'N Grow. It was found that while there was no significant difference in rooting among hormone treatments, plants treated with 3000 ppm Hormodin had the lowest percentage of unrooted cuttings. The significance of shade treatment that increased the percentage of commercially viable cuttings from 38% without shade to 61% with shade was also elaborated.
- Haver, D., & Schuch, U. (2001). Influence of root restriction and ethylene exposure on apical dominance of petunia (Petunia x hybrida Hort. Vilm.-Andr.). Plant Growth Regulation, 35(2), 187-196.More infoAbstract: Reducing rooting volume restricted root growth during the production of Petunia x hybrida 'Orchid' and resulted in an unfavorable increase in apical dominance. Exposing young petunia seedlings to ethylene counteracted the effects of root restriction. Rooting volumes of 9, 28, 58, or 160 mL restricted the development of lateral shoots, thereby increasing apical dominance compared to plants grown in 162 mL rooting volumes. Ethephon, an ethylene-producing compound, increased the development of lateral shoots of seedlings grown in rooting volumes ranging from 28 mL to 160 mL. At a rooting volume of 9 mL, ethylene exposure was not capable of reducing the growth of the main shoot; apical dominance remained strong in both the control and ethephon-treated plants. Because lateral shoot development was not restricted by rooting volumes greater than 160 mL, exposing these plants to ethylene did not result in supplementary lateral shoot development. Levels of indole-3-acetic acid (IAA), isopentenyladenosine (iPA), and zeatin riboside (ZR) decreased on a whole shoot basis as rooting volume decreased from 162 to 58 mL. Indoleacetic acid levels in ethephon-exposed plants decreased 20% compared to the control. The cytokinins iPA and ZR showed no response to ethylene exposure; however, the ratio of auxin/cytokinin decreased 24% compared to the control. The decrease in the auxin/cytokinin ratio was associated with an increase in the number and length of lateral shoots.
- Karlik, J. F., Becker, J. O., & Schuch, U. K. (2001). IPM for field-grown rose plants in California. Acta Horticulturae, 547, 97-102.More infoAbstract: Approximately half of the U.S. rose plant production is located in the southern San Joaquin Valley around Wasco, California. The production of insect-, disease-, and nematode-free plants is required both for product quality and by state regulation. IPM methods are favored wherever practical, and field studies have been executed to investigate both chemical and non-chemical alternatives to current practice. Recent work has included investigation of methyl bromide alternatives for management of soil-borne pests and pathogens, development of sampling strategies and treatment thresholds for spider mites, which are the most important invertebrate pests of roses, and evaluation of acaricides and herbicides. In the current cropping system for roses, methyl bromide is routinely used as a pre-plant soil fumigant to minimize production losses due to soilborne pests including plant parasitic nematodes, fungal and bacterial pathogens, and weeds. Both chemical and non-chemical alternatives for this fumigant are being sought, due to its impending US production and importation ban. Cultural practices for roses are organized around furrow irrigation systems, and the absence of summer rains minimizes disease pressure from several foliar pathogens.
- Karlik, J. F., Schuch, U. K., & Becker, J. O. (2001). Bareroot rose production with underground drip irrigation. Acta Horticulturae, 547, 221-226.More infoAbstract: Field experiments were carried out in 1996-1997 and in 1998-1999 in Shafter, California, using two rose rootstocks, 'Dr. Huey' and 'Manetti', and the cultivar 'Pink Simplicity' to investigate alternative cultural practices for bare-root rose production. The objectives of the experiments were 1.) to determine effects of different depths of buried drip irrigation on growth of roses on raised beds, and 2.) to determine the effect of three in-row spacings on growth of roses on flat ground. Drip tape buried at 30 cm depth versus 10, 20, or 40 cm depth resulted in greatest biomass production of all cultivars during both years of the experiment. For roses planted on flat ground, an in-row spacing of 20 cm produced greater root dry weight and caliper than the 15 cm spacing during both years. In 1997, shoot and total dry weight were greater when plants were grown at 20 cm or 25 cm in-row spacing versus 15 cm spacing, while smaller differences between treatments were found in 1999.
- Schuch, U. K. (2001). An exercise to study the American Standard for Nursery Stock. HortTechnology, 11(1), 128-129.More infoAbstract: A two-part exercise was developed as part of the horticulture curriculum at Iowa State University to familiarize students with the American Standard for Nursery Stock (ASNS), and to allow them to practice and apply the ASNS with a variety of categories and types of ornamental plants. The first part of the exercise requires students to determine, according to ASNS standards, appropriate root ball/container size for plants to be moved from an existing immature landscape. During the second part, students evaluate whether root ball or container size of plants in a nursery is appropriate for the plant shoot dimensions. The exercise was designed for students to work in informal groups in a cooperative learning environment.
- Hanks, L. M., Paine, T. D., Millar, J. G., Campbell, C. D., & Schuch, U. K. (1999). Water relations of host trees and resistance to the phloem-boring beetle Phoracantha semipunctata F. (Coleoptera: Cerambycidae). Oecologia, 119(3), 400-407.More infoAbstract: Environmental stresses, particularly water deficit, predispose eucalypt trees to attack by the eucalyptus longhorned borer, Phoracantha semipunctata F. (Coleoptera: Cerambycidae). Our experiments with potted eucalypts revealed that reduced tree water potential was associated with lower resistance to colonization by neonate P. semipunctata, but the linear relationship between water potential and colonization success was reversed at higher larval densities. There was no indication that the bark exudate 'kino' served to defend trees from borer attack. Larvae were not able to colonize the cambium of eucalypt logs with high bark moisture, and survival was low under high moisture conditions in artificial hosts composed of pure cellulose. In trees, and cut logs with moist bark, larvae failed to reach the cambium, feeding instead in poorer-quality tissues just beneath the bark surface. Our findings suggest that variation in resistance of eucalypts to attack by the borer is associated with moisture content of the bark.
- Bethke, J. A., Redak, R. A., & Schuch, U. K. (1998). Melon aphid performance on chrysanthemum as mediated by cultivar, and differential levels of fertilization and irrigation. Entomologia Experimentalis et Applicata, 88(1), 41-47.More infoAbstract: Population parameters of the melon aphid, Aphis gossypii Glover, were compared for insects grown on six cultivars of chrysanthemum, Dendranthema grandiflora Tzvelev ('Fontana', 'Iridon', 'Pink Lady', 'Splendor', 'White Diamond', and 'White View Time') fertilized with 3 different levels of nitrogen (80, 160 and 240 mg N/1) and 2 levels of irrigation (high 300 ml and low 210 ml every other day). Fecundity, longevity, and survivorship of aphids were significantly affected by the cultivar treatment, but were not affected by irrigation or fertilizer treatments or by any combination of interactions among cultivar, fertilizer and irrigation. Significantly fewer aphids survived on the cultivar 'Pink Lady' (populations reduced by 20.8%) than any other cultivar examined. Intrinsic rates of increase (r(m)), finite rates of increase (R0), and population doubling times (DT) for aphids were different among fertilizer levels and cultivars, but were not different among irrigation levels. There were no significant fertilizer by irrigation interaction effects upon r(m), R0, or DT. The highest rate of fertilizer applied (240 mg N/liter) adversely affected the intrinsic rate of increase of melon aphids; however, aphid intrinsic rate of increase was weakly correlated with foliar soluble protein levels (r = 0.989, P = 0.0954). Foliar soluble protein levels were not associated with fertilization treatment. Melon aphids perform consistently better on the cultivars 'White Diamond', 'Fontana', and 'Splendor', relative to those aphids growing on 'Iridon', 'Pink Lady', or 'White View Time'. In general, melon aphids performed best on 'White Diamond' and poorest on 'Pink Lady'.
- Schuch, U. K., Redak, R. A., & Bethke, J. A. (1998). Cultivar, fertilizer, and irrigation affect vegetative growth and susceptibility of chrysanthemum to western flower thrips. Journal of the American Society for Horticultural Science, 123(4), 727-733.More infoAbstract: 'Fontana', 'Iridon', 'Pink Lady', 'Splendor', 'White Diamond', and 'White View Time' chrysanthemum (Dendranthema xgrandiflorum Ramat.) were grown for 10 weeks with N rates of 80, 160, or 240 mg · L-1 constant liquid fertilization and irrigated at sufficient (high) or deficient (low) amount. Cultivars differed in growth habit, and treatments significantly affected all variables measured. Plants fertilized with 80 mg · L-1 had lower leaf and stem dry mass, less leaf area, and were deficient in leaf N compared with plants fertilized with twice the amount of N. The highest stem dry mass was produced with 160 mg · L-1. Leaf and stem dry mass were reduced 25% for plants receiving low irrigation compared to those receiving high irrigation. In general, leaf area increased when fertilizer was raised from 80 to 160 mg · L-1 but differed by cultivar and irrigation regime when fertilizer was increased to 240 mg · L-1. Three weeks after the experiment started, electrical conductivity (EC) of runoff collected weekly from 'White Diamond' plants fertilized with 240 mg · L-1 exceeded the average EC of the irrigation solution. The 240 mg · L-1 treatment also resulted in excessive EC in the growing substrate at the end of the experiment and reduced stem dry mass by 11% compared with the 160 mg · L-1 fertilizer regime. Substrate EC differed between cultivars in response to fertilizer and irrigation. Significantly more adult western flower thrips [Frankliniella occidentalis (Pergrande)], 55% and 52%, were found on the foliage of 'Pink Lady' and 'Fontana', respectively, than on 'Iridon'. 'Pink Lady' and 'Fontana' had more immature thrips at the end of the experiment than 'Iridon' and 'White View Time'. Fewer adults and iramatures were found on plants fertilized with 80 mg · L-1 than 240 mg · L-1. Fewer adults were detected in plants under high versus low irrigation, while irrigation had no effect on the number of immatures. The simultaneous use of plant varietal resistance and plant cultural growing techniques has the potential to lower thrips populations on chrysanthemum.
- Schuch, U. K., & Burger, D. W. (1997). Water use and crop coefficients of woody ornamentals in containers. Journal of the American Society for Horticultural Science, 122(5), 727-734.More infoAbstract: Twelve species of woody ornamentals were grown in containers in Riverside and Davis, Calif., to determine plant water use and compare crop coefficients (K(c)) calculated with reference evapotranspiration (ET) from local weather stations (ET(cim)) or atmometers (ET(atm)). Water use, Kc(atm), and Kc(cim) differed by species, location, and mouth of the year. Raphiolepis indica (L.) Lindl., Pittosporum tobira (Thunb.) Ait., Juniperus sabina L., and Photinia xfraseri Dress. were the highest water users in Riverside and Arctostaphylos densiflora M.S. Bak., Juniperus, Cercis occidentalis Torr., and Pittosporum used the highest amount of water in Davis, when averaged over the 20-month study period. Rhamnus californica Eschsch., Prunus ilicifolia (Nutt.) Walp., and Cercocarpus minutiflorus Abrams. were among the lowest water users in both locations. Although plant water use fluctuated considerably between individual sampling dates, the relative ranking of species water use in each location changed very little over the study period. During periods of high winds, ET(cim) may not provide an accurate reference for container crops. K(c) values fluctuated seasonally from as much as 1 to 4.7 for high water users, while values were stable for low water users and also for Buxus microphylla japonica Rehd. and E.H. Wils., an intermediate water user. During periods of low ET, especially in fall and winter, K(c) values were artificially high and failed to correspond to the plants' low water use. K(c) values for low water users seem to be useful to estimate water requirements over an extended period of time, whereas general K(c) values seem to have limited value for plants with high water demand and need to be modified for different growth stages and growing locations.
- Haver, D. L., & Schuch, U. K. (1996). Production and postproduction performance of two new guinea Impatiens cultivars grown with controlled-release fertilizer and no leaching. Journal of the American Society for Horticultural Science, 121(5), 820-825.More infoAbstract: The objectives of this study were to determine 1) the minimum controlled-release fertilizer (CRF) rate and the lowest constant medium moisture required to produce the highest quality plants and 2) if this production system affected quality of these plants under two postproduction light levels. Two New Guinea impatiens (Impatiens sp. hybrids) 'Illusion' and 'Blazon' (Lasting Impressions Series) differing in salt tolerance were grown for 42 days with a CRF at three rates (3.3, 6.6, or 9.9 g/pot) and two medium moisture levels (low or high) without leaching. The high moisture level (tension setpoints of 1 to 3 kPa) and 6.6 g of CRF/put produced optimum biomass. Low medium moisture (tension setpoints of 4 to 6 kPa) reduced leaf area, leaf number, leaf N content, root, stem, and leaf dry masses as CRF rate increased from low to high for 'Illusion'. Similar results in 'Blazon' were observed as CRF rates increased from 3.3 to 6.6 g. Biomass decreased no further at the high rate of 9.9 g/pot. Biomass increased in both cultivars under high medium moisture when CRF rates increased from 3.3 to 6.6 g. Biomass of 'Illusion' decreased at 9.9 g/pot, although no symptoms of salt sensitivity were observed (i.e., leaf tip burn). 'Blazon' maintained a similar biomass when amended with 9.9 or 6.6 g CRF/pot, although electrical conductivity (EC) in the medium was 5.9 dS·m -1 in the upper half and 4.1 dS·m-1 in the lower half of the medium at the end of production. Growth of 'Illusion' responded more favorably to postproduction light levels that were similar to those of production regardless of treatment imposed during production. Similar biomass responses occurred for 'Blazon' regardless of the postproduction light level.
- Schuch, U. K., & Pittenger, D. R. (1996). Root and shoot growth of eucalyptus in response to container configuration and copper carbonate. HortScience, 31(1), 165-.
- Schuch, U., Redak, R. A., & Bethke, J. (1996). Whole-plant response of six poinsettia cultivars to three fertilizer and two irrigation regimes. Journal of the American Society for Horticultural Science, 121(1), 69-76.More infoAbstract: Six cultivars of poinsettia (Euphorbia pulcherrima Willd.), 'Angelika White', 'Celebrate 2', 'Freedom Red', 'Lilo Red', 'Red Sails', and 'Supjibi Red' 'were grown for 9 weeks during vegetative development under three constant-feed fertilizer treatments, 80, 160, or 240 mg N/liter and two irrigation regimes, well-watered (high irrigation) or water deficient (low irrigation). Plants fertilized with 80 or 240 mg N/liter were 10% to 18% shorter, while those fertilized with 160 mg N/liter were 25% shorter with low versus high irrigation. Leaf area and leaf dry weight increased linearly in response to increasing fertilizer concentrations. Low irrigation reduced leaf area, leaf, stem, and shoot dry weight 36% to 41%. Cultivate responded similarly to irrigation and fertilizer treatments in all components of shoot biomass production and no interactions between the main effects and cultivars occurred. Stomatal conductance and transpiration decreased with increasing fertilizer rates or sometimes with low irrigation. Highest chlorophyll contents occurred in leaves of 'Lilo Red' and 'Freedom Red'. Leaves of plants fertilized with 80 mg N/liter were deficient in leaf N and had 40% to 49% lower leaf chlorophyll content compared to plants fertilized with 160 or 240 mg N/liter. Irrigation had no effect on leaf N or chlorophyll content. At the end of the experiment leaves of 'Supjibi Red' and 'Angelika White' contained higher concentrations of soluble proteins than the other four cultivars.
- Schuch, U. K., Karlik, J. F., & Harwood, C. (1995). Antidesiccants applied to packaged rose plants affect growth and field performance. HortScience, 30(1), 106-108.
- Schuch, U. K. (1994). Response of chrysanthemum to uniconazole and daminozide applied as dip to cuttings or as foliar spray. Journal of Plant Growth Regulation, 13(3), 115-121.More infoAbstract: Uniconazole and daminozide were used as dip on unrooted cuttings or as foliar spray on pinched Dendranthema grandiflora Tzvelev. 'Dalvina' to control height. Stem elongation was determined on cuttings dipped in solutions of 0, 1.25, 2.5, 5, or 10 mg/L uniconazole or cuttings were dipped and later treated with foliar sprays in concentrations of 1.25/5, 1.25/10, 2.5/10, and 5/5 mg/L uniconazole, respectively. Other plants were sprayed once or twice with uniconazole at 10 mg/L. Daminozide treatments included a pre-plant dip/foliar spray application of 1000/2000 mg/L, respectively, or two foliar sprays of 2,000 mg/L. Uniconazole dip alone retarded stem elongation linearly up to 8 weeks after propagation, 5 weeks after pinching, but was not discernible from the control treatment 8 weeks after pinching. Uniconazole at 2.5/10 and 5/5 mg/L as a dip/spray combination resulted in plants 33% shorter than the control at the end of the production. Doubling uniconazole dip or spray treatments from 5 to 10 mg/L provided no additional reduction of stem elongation. The single uniconazole spray and both daminozide treatments had no effect on final height, although daminozide treatments reduced stem dry weight compared to the control. Stem dry weight was reduced by uniconazole dip/spray combinations compared to dip treatments alone. Similarly, inflorescence and root dry weights were also reduced by the highest uniconazole concentrations. Higher concentrations of uniconazole reduced transpiration on a per leaf area basis up to 47% compared to the control at the end of production. In contrast to previous work, leaf area and leaf thickness increased with some uniconazole treatments, while time to anthesis was not affected by any of the treatments. © 1994 Springer-Verlag New York Inc.
- Schuch, U. K., Azarenko, A. N., & Fuchigami, L. H. (1994). Endogenous IAA levels and development of coffee flower buds from dormancy to anthesis. Plant Growth Regulation, 15(1), 33-41.
- Schuch, U. K., Fuchigami, L. H., & Nagao, M. A. (1990). Gibberellic acid causes earlier flowering and synchronizes fruit ripening of coffee. Plant Growth Regulation, 9(1), 59-64.More infoAbstract: The effect of 100 mgl-1 gibberellic acid (GA3) on flowering and fruit ripening synchrony, fruit set, fruit fresh weight, and vegetative growth were studied for different size classes of coffee (Coffea arabica L. cv. Guatemalan) flower buds. Flower buds that were > 4 mm, but not developed to the candle stage at the time of GA3 treatment, reached anthesis 20 days earlier than the controls, and their development was independent of precipitation, unlike the controls. Fruit from buds that were treated with GA3 at the candle stage showed earlier and more synchronous ripening than the control, although no differences in flowering were found during anthesis. Buds that were smaller than 4 mm at the time of treatment did not respond to GA3 applications. Treatment with GA3 did not affect fruit set, fresh weight of fruits, or vegetative shoot growth. © 1990 Kluwer Academic Publishers.
Presentations
- Schuch, U. K. (2023, August). Shrub irrigation requirements in Arizona. Western States Meeting on Irrigation Requirements. Seattle, WA.
- Li, S., Fournier, A. J., Schuch, U. K., Umeda, K., Gouge, D. H., & Nair, S. (2021, October). Arizona School IPM Conference: Adapting to changing times. 2021 Entomological Society of America Annual Conference.
- Schuch, U. K. (2021, October). Shrub irrigation study in Arizona and the western United States. WERA-1013: Intermountain Regional Evaluation and Introduction of Native Plants. virtual zoom: WERA1013.
- Schuch, U. K. (2019, May 1). Witches Broom on Blue Palo Verde. Western Chapter International Society of Arboriculture Annual Conference. Honolulu, HI.More infoInvited speaker
- Schuch, U. K., Schuch, U. K., Schuch, U. K., Fournier, A. J., Fournier, A. J., Fournier, A. J., Li, S., Li, S., Li, S., Umeda, K., Umeda, K., Umeda, K., Gouge, D. H., Gouge, D. H., Gouge, D. H., Nair, S., Nair, S., & Nair, S. (2019, August). Implementing IPM in Schools without IPM legislation: Experiences from Arizona.. National Environmental Health Association Integrated Pest Management Solutions in Environmental Health Virtual Conference. Virtual: National Environmental Health Association.More info94 participants
- Schuch, U. K. (2018, Nov 1). Ten Problems with Bedding Plants. Desert Green Conference. Las Vegas, NV.More infoInvited presentation
- Schuch, U. K. (2018, Nov 2). Witches Broom on Blue Palo Verde. Desert Green Conference. Las Vegas, NV.More infoInvited presentation
- Schuch, U. K. (2018, Oct.). Implications of Palo Verde Broom for Landscape Maintenance. WC International Society of Arboriculture Regional Conference. Stanford, CA.More infoInvited presentation
- Brown, J. K., & Schuch, U. K. (2016, June). Palo verde witches broom. Desert Horticulture Annual Meeting. Tucson: UA.
- Schuch, U. K. (2016, March). Growing Crops in High Tunnels. Controlled Environment Agriculture Center Short Course. Tucson: CEAC.
- Schuch, U. K. (2016, October). Distinguishing biotic and abiotic problems in trees and shrubs. SW Turfgrass Assoc. Recreational Landscape Conference and Expo. Las Cruces, NM: SW Turfgrass Association and New Mexico State University.
- Schuch, U. K. (2016, October). Irrigation Needs of Southwest Trees. SW Turfgrass Assoc. Recreational Landscape Conference and Expo. Las Cruces, NM: SW Turfgrass Association and New Mexico State University.
- Schuch, U. K. (2016, October). Managing Annual and Perennial Plants - Color in the Landscape. SW Turfgrass Assoc. Recreational Landscape Conference and Expo. Las Cruces, NM: SW Turfgrass Association and New Mexico State University.
- Schuch, U. K. (2016, October). Managing Witches Broom in Nursery Production. IPPS Conference. Tempe: International Plant Propagators' Society Western Chapter.
- Schuch, U. K., & Brown, J. K. (2016, June). Palo Verde Broom Disease. Desert Horticulture Conference. Tucson: UA Cooperative Extension.
- Wright, G. C., & Schuch, U. K. (2015, October). Pomegranates - The Arizona Story. Florida Pomegranate Society Conference. Lake Alfred, FL: Florida Pomegranate Society.
- Baker, P. B., Kopec, D. M., Schuch, U. K., Ellsworth, P. C., Fournier, A. J., Umeda, K. -., Li, S., Nair, S., & Gouge, D. H. (2014, April 2). School IPM Inside and Out. UA-EPA School IPM Grant "Big Check" presentation and recognition event. Metro Tech High School, Phoenix, AZ.
- Li, S., Nair, S., Kopec, D. M., Umeda, K., & Schuch, U. K. (2014, May 28). Plant Health Practicum. Maricopa Unified School District Office, Maricopa, AZ.
- Schuch, U. K., Martin, E., & Mahato, T. (2014, August). Response of desert-adapted landscape trees to deficit irrigation. 29th International Horticultural Congress. Brisbane, Australia.
- Schuch, U. K., Umeda, K., Kopec, D. M., Nair, S., & Li, S. (2014, May 28). Plant Health Practicum and Seminar. Maricopa Unified School District Office, Maricopa, AZ. Plant Health Practicum. Maricopa Unified School District Office, Maricopa, AZ. Maricopa, AZ.
- Schuch, U. K., Martin, E. C., Subramani, J., & Mahato, T. (2013, July). Performance of Landscape Trees in the Semi-Arid Southwest under Three Irrigation Regimes. ASHS Annual Conference. Palm Desert, CA: American Society for Horticultural Sciences.
- Dillard, A., Mahato, T., & Schuch, U. (2012, May). Comparing transplant establishment with surface and subsurface irrigation. Desert Horticulture Conference and CALS Cooperative Extension Conference. Tucson, AZ.
Poster Presentations
- Schuch, U. K. (2023, Jan/Feb). Reclaimed water and drought effects on growth and physiology of arid-adapted plants. Xth International Symposium on Irrigation of Horticultural Crops. Stellenbosch, South Africa: International Society for Horticultural Sciences.
- Schuch, U. K., & Gilbert, J. (2021, August). Rainwater Harvesting and Water Conservation in Arizona. Annual Conference of the American Society for Horticultural Sciences. Denver, CO: ASHS.
- Schuch, U. K., Li, S., Fournier, A. J., Umeda, K., Gouge, D. H., & Nair, S. (2021, October). Why should we care about school IPM?. Entomological Society of America Annual Meeting 2021. Virtual: ESA.
- Mpanga, I., Schalau, J. W., Schuch, U. K., Schuch, U. K., Schalau, J. W., & Mpanga, I. (2020, October). Regenerative and Sustainable Agriculture: The Interest of Small-scale Growers in Northern Arizona. University of Arizona Cooperative Extension, 2020 Annual Conference. Virtual.
- Nair, S., Gouge, D. H., Umeda, K., Li, S., Fournier, A. J., & Schuch, U. K. (2020, November). Does implementation of school IPM need supporting legislation?. 2020 Entomological Society of America Virtual Annual Meeting. Virtual.
- Schuch, U. K., Fournier, A. J., Li, S., Umeda, K., Gouge, D. H., & Nair, S. (2020, November / Winter). Does implementation of school IPM need supporting legislation?. Entomological Society of America Virtual Annual Meeting 2020. November 11 – 25, 2020.. Online: Entomological Society of America.
- Schuch, U. K., Fournier, A. J., Li, S., Umeda, K., Gouge, D. H., & Nair, S. (2020, October). Implementing IPM in Schools without IPM legislation: Experiences from Arizona.. 2020 Arizona Cooperative Extension Virtual Conference. Virtual.
- Schuch, U. K., & Gilbert, J. (2019, July). Opportunities to Improve Landscape Irrigation. American Society for Horticultural Sciences Annual Conference. Las Vegas, NV: American Society for Horticultural Sciences.
- Avelar, S., Ilyas, M., Brown, J. K., Schuch, U. K., & Hall, W. G. (2018, Aug.). Association of a previously undescribed RNA virus with witches’ broom of blue palo verde. CALS Extension Conference.
- Kopec, D. M., Nair, S., Nair, S., Green, T., Green, T., Schuch, U. K., Li, S., Gouge, D. H., Gouge, D. H., Fournier, A. J., Umeda, K., Umeda, K., Umeda, K., Fournier, A. J., Fournier, A. J., Gouge, D. H., Li, S., Li, S., Green, T., , Schuch, U. K., et al. (2018, March 19-22). Recognizing Excellence in School Integrated Pest Management. 9th International IPM Symposium. Baltimore, Maryland.
- Tronstad, R. E., Teegerstrom, T., & Schuch, U. K. (2015, Sept). Growing the Management Skills of Native American and Limited-Resource Beginning Farmers in the Southwest. 2015 Beginning Farmer and Rancher Development Program and Federally Recognized Tribal Extension Program. Reno, NV: USDA NIFA.
- Wright, G. C., & Schuch, U. K. (2015, Aug). Pomegranate Variety Trial in Arizona. American Society for Horticultural Sciences Conference. New Orleans: American Society for Horticultural Sciences.
- McKenney, C., Mahato, T., & Schuch, U. K. (2014, August). Salinity tolerance of ornamental grasses adapted to semi-arid environments. 29th International Horticultural Congress. Brisbane, Australia.
- Nair, S., Gouge, D. H., Li, S., Fournier, A. J., Ellsworth, P. C., Umeda, K., Schuch, U. K., Kopec, D. M., & Baker, P. B. (2014, 10/4). Community IPM-Integrated pest management for community environments. Central Arizona Cooperative Extension Centennial Celebration - Celebrating the Past, Envisioning the Future, Phoenix AZ. Phoenix, AZ: CALS.
- Nair, S., Gouge, D. H., Li, S., Fournier, A. J., Ellsworth, P. C., Umeda, K., Schuch, U. K., Kopec, D. M., & Baker, P. B. (2014, 11/10). Bed Bug Battle IPM Mosquito Management and Fall Landscape Checklist School and Home IPM Newsletter October 2014.. Arizona Cooperative Extension. Tucson, AZ: CALS.
- Nair, S., Gouge, D. H., Li, S., Fournier, A. J., Ellsworth, P. C., Umeda, K., Schuch, U. K., Kopec, D. M., & Baker, P. B. (2014, 11/10). Community IPM-Integrated pest management for community environments. CALS Annual Research Poster Forum. Tucson, AZ: CALS.
- Nair, S., Nair, S., Gouge, D. H., Gouge, D. H., Li, S., Li, S., Fournier, A. J., Fournier, A. J., Ellsworth, P. C., Ellsworth, P. C., Umeda, K., Umeda, K., Schuch, U. K., Schuch, U. K., Kopec, D. M., Kopec, D. M., Baker, P. B., & Baker, P. B. (2014, October 4). Community IPM-Integrated pest management for community environments. Central Arizona Cooperative Extension Centennial Celebration - Celebrating the Past, Envisioning the Future, Phoenix AZ. Phoenix, AZ: CALS.
- Schuch, U. K., Wright, G. C., & Mahato, T. (2014, May 9). Pomegranate Variety Trial in Southern Arizona. Desert Horticulture Conference. Tucson.
- Schuch, U. K., Wright, G. C., & Mahato, T. (2014, November 10). Pomegranate Variety Trial in Southern Arizona. CALS Annual Research Poster Forum. Tucson.
- Warren, P., Schuch, U. K., & Quist, T. (2014, 11/10). Pine Engraver Beetles Invade the Sonoran Desert. CALS Annual Research Poster Forum. Tucson, AZ: CALS.
- Schuch, U. K., Hanson, K., & Mahato, T. (2013, July). Leafy Vegetable and Herb Production and Costs in High Tunnels in the Arid Southwest. ASHS Annual Conference. Palm Desert, CA: American Society for Horticultural Sciences.
- Schuch, U. K., Wright, G. C., & Mahato, T. (2013, July). Pomegranate Variety Trial in Southern Arizona.. ASHS Annual Conference. Palm Desert, CA: American Society for Horticultural Sciences.
Case Studies
- Mpanga, I., Schuch, U. K., Braun, H. L., Wilson, H., Stuth, C. L., Schalau, J. W., & Tronstad, R. E. (2021. COVID 19 Effects on Farming Activities in Arizona and how Farmers and Ranchers Responded(p. 23).
- Mpanga, I., Schuch, U. K., & Schalau, J. W. (2020. Needs Assessment for Commercial Horticulture and Small Acreage (CHSA) in northern Arizona(p. 15).
Others
- Tronstad, R. E., Schalau, J. W., Stuth, C. L., Wilson, H., Braun, H. L., Schuch, U. K., & Mpanga, I. (2021, March). AZ1867-2021: COVID-19 Effects on Farming Activities in Arizona and how Farmers and Ranchers Responded. University of Arizona Cooperative Extension Publication. https://extension.arizona.edu/pubs/covid-19-effects-farming-activities-arizona-how-farmers-ranchers-responded
- Li, S., Chamberland, M. J., Umeda, K., Schuch, U. K., & Nair, S. (2020, December). Year-end landscape and turf tips.. Community IPM Newsletter. https://acis.cals.arizona.edu/docs/default-source/community-ipm-documents/newsletters/dec2020azschoolandhomeipmnewletter-v2.pdf
- Schuch, U. K. (2020, August). Rain Water Harvesting Saves Water and Supports Healthy Trees. Southwest Horticulture. https://wrrc.arizona.edu/publications/water-harvesting/rain-water-harvesting-saves-water-and-supports-healthy-treesMore infoVol. 37(4):5
- Schuch, U. K., & Brown, J. K. (2018, Sept./Oct.). Cause of Witches Broom on Blue Palo Verde. The ALCA Influence.
- Schuch, U. K. (2017, Spring). Trouble Shooting Problems of Bedding Plants in the Southwest. Backyards and Beyond.
- Schuch, U. K., & Kelly, J. J. (2017, Spring). Selecting, Planting, and Staking Trees. University of Arizona Cooperative Extension.More infoI reviewed the PowerPoint Cooperative Extension Publication az1402-2017. My co-author is retired.
- Schuch, U. K. (2016, Nov/Dec). ACLP Pest Alert: Witches Broom on Blue Palo Verde. The ALCA Influence.More infopage 21
- Teegerstrom, T., Tronstad, R., & Schuch, U. K. (2016, Summer). Crop Pocket RecordKeeping Workbook. AREC Printing and Compiling.More infoCrop Pocket Record Keeping Workbook
- Li, S., Gouge, D. H., Nair, S., Fournier, A. J., Schuch, U. K., Umeda, K., Kopec, D. M., & Baker, P. B. (2015, March). Poison Prevention and Pesticide Safety School and Home IPM Newsletter March 2015. Newsletter. University of Arizona Arizona Pest Management Center.. http://cals.arizona.edu/apmc/docs/2015MarchAZschoolandhomeIPMNewletter.pdf
- Li, S., Gouge, D. H., Nair, S., Fournier, A. J., Schuch, U. K., Umeda, K., Kopec, D. M., & Warren, P. L. (2015, September). Mosquito-borne Diseases and Mosquito IPM. College of Agriculture and Life Sciences Cooperative Extension, University of Arizona. https://extension.arizona.edu/sites/extension.arizona.edu/files/resources/Mosquito%2 0Information.pdf
- Nair, S., Umeda, K., Ellsworth, P. C., Gouge, D. H., Schuch, U. K., Senior, R., & Li, S. (2015, June). Identification and biology of the Ficus whitefly. Cooperative Extension, AZ Pest Management Center. http://cals.arizona.edu/apmc/docs/Ficus_Whitefly_Short2.pdfMore infoIPM Short publication
- Nair, S., Umeda, K., Ellsworth, P. C., Gouge, D. H., Schuch, U. K., Senior, R., & Li, S. (2015, June). Integrated pest management of the Ficus whitefly. Cooperative Extension, AZ Pest Management Center. http://cals.arizona.edu/apmc/docs/Ficus_Whitefly_Short1.pdfMore infoIPM Short publication
- Nair, S., Umeda, K., Ellsworth, P. C., Gouge, D. H., Schuch, U. K., Senior, R., & Li, S. (2015, June). Plant health care for ficus plants following ficus whitefly damage.. Cooperative Extension, AZ Pest Management Center. http://cals.arizona.edu/apmc/docs/Ficus_Whitefly_Short3.pdfMore infoIPM Short publication
- Schuch, U. K. (2015, Jan/Feb). Irrigation Needs of Landscape Trees. Southwest Trees and Turf.
- Schuch, U. K. (2015, Sep/Oct). Landscape Tree Performance - Four Years of Irrigation Treatments and One Year of Drought. The ALCA Influence.More infopage 21
- Schuch, U. K., & Teegerstrom, T. (2015, March). Navigating Production Risks in the Nursery. American Nurseryman. http://www.amerinursery.com/nursery-insight/navigating-production-risks-in-the-nursery/
- Li, S., Gouge, D. H., Nair, S., Fournier, A. J., Schuch, U. K., Baker, P. B., Umeda, K. -., & Kopec, D. M. (2014, April). EPA Awarded Three Grants to Facilitate IPM in Schools. School Integrated Pest Management (IPM) Newsletter - April 2014. Newsletter. University of Arizona Arizona Pest Management Center.. http://cals.arizona.edu/apmc/docs/2014AprilAZschoolIPMNewsletter.pdf
- Li, S., Gouge, D. H., Fournier, A. J., Schuch, U. K., Baker, P. B., Umeda, K. -., & Kopec, D. M. (2013, June). Bed Bugs Awareness. School Integrated Pest Management (IPM) Newsletter - June 2013. Newsletter. University of Arizona Arizona Pest Management Center.. http://cals.arizona.edu/apmc/docs/2013JuneSchoolIPMNewsletter.pdf
- Li, S., Gouge, D. H., Fournier, A. J., Schuch, U. K., Baker, P. B., Umeda, K. -., & Kopec, D. M. (2013, March). Healthy Schools and IPM Education. School Integrated Pest Management (IPM) Newsletter - March 2013. Newsletter. University of Arizona Arizona Pest Management Center.. http://cals.arizona.edu/apmc/docs/2013MarchAZSchoolIPM.pdf
- Li, S., Gouge, D. H., Fournier, A. J., Schuch, U. K., Baker, P. B., Umeda, K., & Kopec, D. M. (2013, June). Bed Bugs Awareness. School IPM Newsletter - June 2013. University of Arizona Arizona Pest Management Center. http://cals.arizona.edu/apmc/docs/2013JuneSchoolIPMNewsletter.pdf
- Li, S., Gouge, D. H., Nair, S., Fournier, A. J., Schuch, U. K., Baker, P. B., Umeda, K. -., & Kopec, D. M. (2013, August). Seven Steps to Start a School IPM Program. School Integrated Pest Management (IPM) Newsletter - August 2013. Newsletter. University of Arizona Arizona Pest Management Center.. http://cals.arizona.edu/apmc/docs/2013AugustSchoolIPMNewsletter.pdf
- Li, S., Gouge, D. H., Nair, S., Fournier, A. J., Schuch, U. K., Baker, P. B., Umeda, K. -., & Kopec, D. M. (2013, October - December). School Integrated Pest Management (IPM) Newsletter - Aug., Sept., Oct., Nov. Dec. issues 2013. Newsletter. University of Arizona Arizona Pest Management Center.. http://cals.arizona.edu/apmc/docs/2013OctoberAZSchoolIPMNewsletter.pdf
- Gouge, D., Schuch, U., Kopec, D., Baker, P., Umeda, K., & Stevens, B. (2012, Fall). Integrated Pest Management Works Inside and Outside School Buildings. UA Cooperative Extension az1579. http://cals.arizona.edu/pubs/insects/az1579.pdf
- Schuch, U. (2012, Fall). New USDA plant hardiness zone map - what does it mean for Arizona?. Southwest Horticulture.More infoVolume 29, Issue 2, pgs 8-9
- Schuch, U. (2012, May/June). How often should landscape trees be irrigated?. ALCA Influence.More infopg 23
- Teegerstrom, T., & Schuch, U. (2012, December). Policy of Protection. Nursery Management.More infopgs 28-31
- Da, S., Mundo-Ocampo, M., Karlik, J., Schuch, U., Becker, J., & Becker, J. (2011, Spring). Rose Replant Problem Apparently of Biological Nature. University of California Nursery and Floriculture Alliance. http://ucanr.org/sites/UCNFAnews/newsletters/Download_UCNFA_News_as_PDF34772.pdfMore infoVolume 15, Issue 2, pg 18
- Schuch, U. K. (2011, April). Starting a wholesale nursery. AZ1393.
- Schuch, U. K. (2011, March). Selecting and planting trees. AZ1402.
- Teegerstrom, T., & Schuch, U. (2011, Fall). Is Nursery Insurance Practical to Manage Risk in your Business?. University of California Nursery and Floriculture Alliance. http://ucanr.org/sites/UCNFAnews/newsletters/Download_UCNFA_News_as_PDF40180.pdfMore infoVolume 15, Issue 3, pgs 18-19